TIC 156153223

Transit candidatePossible rare find

Rare & notable finds

Something genuinely unusual turned up. Treat it as a lead: every one of these has ordinary explanations too, listed with each. How these checks work →

Fully unknown: not in SIMBAD, not in Gaia DR3's variable lists, not on NASA's TOI lists, no catalogued variable star within 5′ (VSX, ASAS-SN, ZTF, ATLAS, WISE, TESS EB catalogues) - this may be new.

Dimming beside the transit hint
On average the star is 596 ppm dimmer just before and after the transit (4.8 sigma): what a moon (or ring/dust) travelling with the planet would cause. Instrument trends can do this too.
Single transit of another planet significant
Besides the known planet: the dip is not alone: 12 similar dips at regular intervals (first at BTJD 2394.00) - a periodic transit worth a full planet check.

Checked, nothing found (10)

Microlensing (rogue planet?) · Exocomet-shaped dip · Habitable zone & size · Transit timing (TTV) · Transit duration (TDV) · Changing transit depth · Lopsided transit · Trojan companions (L4/L5) · Self-lensing binary · Type of star

Checked 2026-10-11 16:58 on NVIDIA GeForce RTX 4070, using every TESS sector of this star. All results (.json)

Notes

Probably noise or an instrument effect. POSSIBLE RARE FIND: Dimming beside the transit; Single transit of another planet. See the Rare & notable finds section. Found automatically by hunt.py in TESS sector 21 (flagged in 4 sector(s)). Detection score 93.3. Not in VSX, ASAS-SN or ZTF variable catalogues at the time of the search; not in Gaia DR3's variable lists. Unchecked by hand yet: verify the period, nearby stars and a wider catalogue search. Updates: 2026-10-11 Planet check: Probably noise or an instrument effect 2026-10-11 Rare-find check: Single transit of another planet; Dimming beside the transit 2026-10-11 Gaia hints at a hidden companion star (RUWE 4.4) 2026-10-11 Found by the automatic search in TESS sector 21

The signal

Type	Transit candidate
Status	Possible rare find
Period (days)	7.60285
Period source	hunt.py on TESS QLP sector 21
Eclipse / dip depth	3.9%
Amplitude	0.6%
Data used	TESS sector 21 (QLP)

Planet check

Verdict	Probably noise or an instrument effect ExoFOP check plot all test results light curve data
Size if it's a planet	~46.0 Earth radii (~4.11 Jupiter) - too big for a planet

The star (Gaia & TESS)

Distance (pc)	976 (~3,182 light years)
Temperature (Gaia)	5,233 K
Size (Gaia)	2.45 x the Sun
Mass (Gaia)	1.26 x the Sun
Luminosity (Gaia)	4.02 x the Sun
Colour, Gaia BP-RP	1.04
RUWE (Gaia)	4.38 - hints at a hidden companion star
Gaia G mag	13.26
TESS mag	12.71

Names & neighbours

TIC ID	156153223
Gaia DR3 ID	1134412982996117504
SIMBAD name	not in SIMBAD
Nearest known variable	none within 5'
RA (deg)	171.21
Dec (deg)	82.2173
Look it up	SIMBAD · VSX · ESASky · ExoFOP

Record

Found by	hunt.py (automatic)
Date	2026-10-11
Last update	2026-10-11

Where it sits among the stars

ESA Gaia colour and true brightness. Grey: every Star Log candidate. Orange: this star.

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Data files

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